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10 persons at the following rates per person day

• 150 litres per day
• 70 grams BOD5
• 70 grams suspended solids
• 15 grams total nitrogen
• 2.5 grams total phosphorous

Anaerobic Chamber

• 3247 litres
• Minimum size allowed based on AS1546 is 24 hours retention and 3 years sludge retention + 3050 litres
• Divided into tow compartments – primary 1 = 66% capacity, primary 2 = 34% capacity

Aerobic Chamber

• 2852 litres which is 45.6 hours detention or 285.2 litres per person
• Media surface area 200m2/m3 – refer attached specification sheet
• Based on 8.42 grams BOD5 removed per m2 surface area

Freeboard

• 1000 litres at 250mm below top of insert
• 1600 litres total freeboard prior to over flow into chlorination and pump well chamber
• Based on 8.42 grams BOD5 removed per m2 surface area

Air Supply

• Model Hiblow HP80 Blower or equivalent – refer attached specifications
• Minimum D.O. Level 2.0mg/L

Clarifying Chamber

• 0.5289m2 surface area
• 460 litres – 7.36 hours retention
• Sludge hopper minimum 55degrees to horizontal

Disinfection Chamber

• 165 litres
• Based on maximum flow 5L.P.M at high flows. Contract time will be 33 minutes
• Adjustment cap to increase or decrease chlorination
• 2 chlorine canisters standards with space to add third canister if required
• Maintains free chlorine residual of 0.2 to 2mg/L
• Minimum 4 months chlorine storage

Irrigation Chamber

• 165 litres
• Dab600 irrigation pump or equivalent minimum – refer attached specification

Concrete Tanks

• Must be accredited by Director general of NSW Health

Other

• All components stainless steel or other non corroding material
• Plastic and perishable components will retain their integrity under normal operating conditions
• All components to be firmly fixed to withstand loads encountered during transpiration, installation and normal operation
• All mechanical and electrical equipment not designed for submergence will be above maximum water level of system
• All equipment suitable for continuous and intermittent operation

Alarm System

• Audible and visual alarms with muting facility for the audible alarm
• Alarm indication for electrical, blower and pump failure
• Mute switch will reset after 24 hours
• Alarm will be visible from residence
• All wiring in accordance with AS3000 “Electrical Installation – Buildings Structures and Premises”

Noise

• Maximum 55 DB (A) at 1 meter